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Analog Devices Inc. LTC2051IDD#PBF
- Part No.:
- LTC2051IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2051IDD#PBF.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,657
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Product details
Overview
LTC2051IDD#PBF from Analog Devices (formerly Linear Technology) is a dual zero-drift operational amplifier in an 8-lead 3mm × 3mm DFN package, designed for precision DC-coupled signal conditioning. It delivers maximum input offset voltage of 3μV, max offset drift of 30nV/°C, rail-to-rail output swing, and 1.5μVP-P (0.01Hz–10Hz) noise - enabling high-resolution thermocouple amplification and strain gauge measurement in industrial sensor interfaces.
For engineers reviewing the LTC2051IDD#PBF datasheet, LTC2051IDD#PBF pinout, LTC2051IDD#PBF application, or LTC2051IDD#PBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, 7.5kHz autozero clock frequency, shutdown capability (in MS10 variants), and compatibility with low-source-impedance (<10kΩ) configurations to minimize clock feedthrough in medical instrumentation and electronic scales.
Technical Context
The LTC2051IDD#PBF employs chopper-stabilized autozeroing architecture with internal 7.5kHz sampling clock to continuously correct input offset and drift. Its dual op-amp core features separate input stages buffered by chopper networks, achieving near-zero DC error without external trimming.
It supports single-supply operation from 2.7V up to ±5.5V total supply, with extended common-mode input range (V– to V+ – 1.3V) and rail-to-rail output drive into 2kΩ loads. The DFN package includes an exposed pad electrically connected to V–, enhancing thermal performance (θJA = 160°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | Max ±3μV - enables sub-10μV system-level DC error in precision bridge amplifiers without calibration. |
| Offset Drift | Max ±30nV/°C - ensures <1μV total drift over full –40°C to 85°C operating range, critical for unattended industrial sensors. |
| Input Noise (0.01Hz–10Hz) | 1.5μVP-P - supports 18-bit+ effective resolution in DC-coupled data acquisition systems. |
| Gain-Bandwidth Product | 3MHz - sufficient for stable closed-loop gain ≥100 at 30kHz, suitable for active filter and sensor signal chain stages. |
| Supply Current per Amp | 0.75mA typical at 3V - allows dual-channel precision amplification within 1.5mA total budget for battery-powered portable instruments. |
| CMRR / PSRR | 130dB typical - rejects >1M:1 common-mode and power supply interference, essential for low-level signal extraction from noisy environments. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial control, automotive cabin electronics, and outdoor environmental monitoring. |
Pinout & Package
Package: 8-lead 3mm × 3mm × 0.8mm plastic DFN (DD) with exposed thermal pad connected to V– (Pin 4). RoHS-compliant, lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Rail-to-rail capable; drives 2kΩ load to within 15mV of rails at 3V supply. |
| 2 - –IN A | Inverting input A | High-impedance node; sensitive to clock feedthrough if source impedance >10kΩ. |
| 3 - +IN A | Non-inverting input A | DC-coupled; common-mode range extends to V– and within 1.3V of V+. |
| 4 - V– | Negative supply / ground reference | Exposed pad internally tied to this pin; must be soldered to PCB ground plane for thermal and noise performance. |
| 5 - V+ | Positive supply | Accepts 2.7V to 5.5V single supply or ±2.75V dual supply; PSRR >120dB across 10Hz–100kHz. |
| 6 - OUT B | Amplifier B output | Independent output; no crosstalk specification given, but layout isolation recommended for <1μV inter-channel coupling. |
| 7 - –IN B | Inverting input B | Functionally identical to Pin 2; shares same autozero clock and bias current characteristics. |
| 8 - +IN B | Non-inverting input B | Matches Pin 3; supports independent dual-channel configuration without shared reference constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift autozeroing | Internal 7.5kHz chopper clock continuously nulls input offset and drift - eliminates manual calibration and thermal drift-induced baseline shift. |
| Rail-to-rail output | Swings within 15mV of V+ and 2mV of V– into 2kΩ - maximizes dynamic range in low-voltage (3V) systems without level-shifting circuitry. |
| Ultra-low 0.01Hz–10Hz noise | 1.5μVP-P - enables direct digitization of microvolt-level thermocouple outputs with no additional filtering or averaging. |
| High CMRR/PSRR | 130dB typical - maintains accuracy in presence of 100mV AC line noise or 50mV supply ripple without external regulation. |
| Extended temperature operation | Specified –40°C to +85°C - validated for use in industrial PLC I/O modules and automotive engine bay proximity sensors. |
Applications
| Thermocouple Amplification | Strain Gauge Signal Conditioning |
|---|---|
Use Scenario: Amplifying μV-level Seebeck voltage from Type-K thermocouples in furnace temperature controllers with 0.1°C resolution. IC Role / Device Role / Timing Role: Primary DC-coupled instrumentation amplifier stage; provides gain, offset correction, and noise filtering before ADC. Use Value: 3μV max offset and 30nV/°C drift ensure <0.5°C absolute error over full temperature range without software compensation. | Use Scenario: Reading differential voltage from 350Ω Wheatstone bridge in load cell-based electronic scales. IC Role / Device Role / Timing Role: First-stage low-noise, low-drift amplifier with gain ≥100; rejects bridge common-mode voltage and EMI. Use Value: 1.5μVP-P noise and 130dB CMRR enable 20-bit effective resolution at 10SPS, supporting 10,000:1 weighing ratio. |
| Medical ECG Front-End | High-Resolution Data Acquisition |
Use Scenario: Biopotential amplification in portable ECG monitors requiring DC-coupled baseline stability and sub-μV noise. IC Role / Device Role / Timing Role: Instrumentation-grade buffer and gain stage; handles electrode half-cell potential offsets and motion artifact rejection. Use Value: Rail-to-rail output swing and 0.75mA supply current allow integration into ultra-low-power wearable designs with 3V coin-cell operation. | Use Scenario: Precision analog front-end for 24-bit delta-sigma ADC in industrial process monitoring systems. IC Role / Device Role / Timing Role: Programmable-gain amplifier (PGA) driver; conditions signals from RTDs, thermistors, and pressure transducers. Use Value: Guaranteed –40°C to +85°C operation and 140dB open-loop gain ensure stable closed-loop performance across environmental extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2051CS8#PBF | SO-8 package; same electrical specs but higher θJA (250°C/W); no exposed thermal pad. | Better suited for prototyping on through-hole or standard SO footprints; less optimal for high-density or thermally constrained PCBs. | Select when board space allows larger footprint and thermal management is handled externally via copper pour. |
| AD8628ARZ | Single zero-drift op amp; 1μV max offset, 0.005μV/°C drift, 1.5μVP-P noise; SO-8 only. | Requires two devices for dual-channel function; lacks guaranteed –40°C to +85°C spec (rated –40°C to +125°C but not fully characterized at 85°C). | Choose for ultra-low-drift single-channel needs where dual-channel integration is not required and cost-per-channel is secondary. |
Compared with LTC2051CS8#PBF and AD8628ARZ, the LTC2051IDD#PBF offers superior thermal performance in compact layouts and guaranteed industrial temperature operation - making it optimal for space-constrained, high-reliability dual-channel precision analog signal chains.
Availability
LTC2051IDD#PBF is available at Aetrix Electronics and suitable for thermocouple amplification, strain gauge signal conditioning, and high-resolution data acquisition requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC2051IDD#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2051IDD#PBF belongs to ADI's precision zero-drift op amp product line, engineered specifically for DC-accurate, low-noise, low-drift signal conditioning in sensor interfaces, medical instrumentation, and test equipment.
FAQ
What is the maximum input offset voltage specification for the LTC2051IDD#PBF?
The LTC2051IDD#PBF has a maximum input offset voltage of ±3μV across its specified operating temperature range of –40°C to +85°C. This value is guaranteed by design and testing per Linear Technology's characterization methodology. The typical offset is ±0.5μV, and the parameter applies to both amplifiers in the dual package. This specification directly enables high-accuracy DC measurements in applications like electronic scales and thermocouple amplifiers where calibration-free operation is required.
Does the LTC2051IDD#PBF include a shutdown feature?
No, the LTC2051IDD#PBF does not include a shutdown pin. Shutdown functionality is only available in the 10-lead MSOP (MS10) package variants such as LTC2051CMS10#PBF. The DD package (LTC2051IDD#PBF) has no dedicated SHDN pin; all eight pins are assigned to power, inputs, and outputs. Therefore, power-down must be implemented externally via supply switching or series FETs if required in the system design.
What is the autozero clock frequency of the LTC2051IDD#PBF, and how does it affect system design?
The LTC2051IDD#PBF uses an internal autozero clock frequency of 7.5kHz. This clock introduces two forms of clock feedthrough: one input-referred (<1μVRMS) and another dependent on input source impedance. To minimize impact, keep input source resistance below 10kΩ and use feedback capacitors to limit closed-loop bandwidth. The 7.5kHz frequency falls outside audio bands but must be considered in anti-aliasing filter design for ADC-driven systems using the LTC2051IDD#PBF.
Can the LTC2051IDD#PBF operate from a single 3V supply?
Yes, the LTC2051IDD#PBF is fully specified for single-supply operation from 2.7V to 5.5V. At 3V supply, it delivers rail-to-rail output swing (within 15mV of V+ and 2mV of V– into 2kΩ), 0.75mA typical supply current per amplifier, and maintains 130dB CMRR and PSRR. Its extended common-mode input range (V– to V+ – 1.3V) allows direct interfacing with grounded sensors or bridges without level-shifting circuitry - making it ideal for 3V battery-powered instrumentation.
How is thermal performance managed in the LTC2051IDD#PBF's DFN package?
The LTC2051IDD#PBF's 8-lead DFN (DD) package includes an exposed thermal pad electrically connected to V– (Pin 4). For optimal thermal performance (θJA = 160°C/W), this pad must be soldered to a minimum 100mm² internal or external PCB copper plane tied to the system ground. Insufficient pad area or poor solder wetting increases junction temperature, potentially degrading offset drift and long-term reliability. The datasheet specifies that expanded metal area on all layers reduces θJA significantly below the nominal value.
LTC2051IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 90 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC2051IDD#PBF FAQ
1.How can I place an order for LTC2051IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2051IDD#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2051IDD#PBF reliable?
The price and inventory of LTC2051IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2051IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2051IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2051IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2051IDD#PBF?
LTC2051IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2051IDD#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2051IDD#PBF?
For technical support, including LTC2051IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2051IDD#PBF requirements.
6.How does Aetrix verify that LTC2051IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2051IDD#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2051IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2051IDD#PBF?
All LTC2051IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2051IDD#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2051IDD#PBF part is unused and in its original packaging.
Return procedure for LTC2051IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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